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  • Martinez-Sanz, MartaIATA-CSIC, Spain,CSIC - Instituto de Agroquimica y Tecnologia de los Alimentos (IATA) (author)

Advanced structural characterisation of agar-based hydrogels : Rheological and small angle scattering studies

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • Elsevier BV,2020
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:ri-44985
  • https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-44985URI
  • https://doi.org/10.1016/j.carbpol.2019.115655DOI
  • https://research.chalmers.se/publication/516188URI
  • https://research.chalmers.se/publication/516086URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Agar-based extracts from Gelidium sesquipedale were generated by heat and combined heat-sonication, with and without the application of alkali pre-treatment. Pre-treatment yielded extracts with greater agar contents; however, it produced partial degradation of the agar, reducing its molecular weight. Sonication produced extracts with lower agar contents and decreased molecular weights. A gelation mechanism is proposed based on the rheological and small angle scattering characterization of the extracts. The formation of strong hydrogels upon cooling was caused by the association of agarose chains into double helices and bundles, the sizes of which depended on the agar purity and molecular weight. These different arrangements at the molecular scale consequently affected the mechanical performance of the obtained hydrogels. Heating of the hydrogels produced a gradual disruption of the bundles; weaker or smaller bundles were formed upon subsequent cooling, suggesting that the process was not completely reversible.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Ström, Anna,1976Chalmers University of Technology, Sweden,Chalmers tekniska högskola(Swepub:cth)annastr (author)
  • Lopez-Sanchez, Patricia,1977RISE,Jordbruk och livsmedel,RISE Research Institutes of Sweden(Swepub:cth)patlop (author)
  • Knutsen, Svein HalvorNofima AS, Norway,Norwegian Institute of Food, Fisheries and Aquaculture Research (Nofima) (author)
  • Ballance, SimonNofima AS, Norway,Norwegian Institute of Food, Fisheries and Aquaculture Research (Nofima) (author)
  • Zobel, Hanne KristineNofima AS, Norway,Norwegian Institute of Food, Fisheries and Aquaculture Research (Nofima) (author)
  • Sokolova, AnnaAustralian Nuclear Science and Technology Organisation, Australia (author)
  • Gilbert, ElliotAustralian Nuclear Science and Technology Organisation, Australia; University of Queensland, Australia (author)
  • Lopez-Rubio, AmparoIATA-CSIC, Spain,CSIC - Instituto de Agroquimica y Tecnologia de los Alimentos (IATA) (author)
  • IATA-CSIC, SpainCSIC - Instituto de Agroquimica y Tecnologia de los Alimentos (IATA) (creator_code:org_t)

Related titles

  • In:Carbohydrate Polymers: Elsevier BV2360144-86171879-1344

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